Solution: The GCF of 33 and 82 is 1MethodsHow to find the GCF of 33 and 82 using Prime FactorizationOne way to find the GCF of 33 and 82 is to compare the prime factorization of each number. To find the prime factorization, you can follow the instructions for each number here:What are the Factors of 33?What are the Factors of 82?Here is the prime factorization of 33:31×1113^1 × 11^131×111And this is the prime factorization of 82:21×4112^1 × 41^121×411When you compare the prime factorization of these two numbers, you can see that there are no matching prime factors. When this is the case, it means that there are no common factors between these two numbers. As a result, the GCF of 33 and 82 is 1.Thus, the GCF of 33 and 82 is: 1How to Find the GCF of 33 and 82 by Listing All Common FactorsThe first step to this method of finding the Greatest Common Factor of 33 and 82 is to find and list all the factors of each number. Again, you can see how this is done by looking at the “Factors of” articles that are linked to above.Let’s take a look at the factors for each of these numbers, 33 and 82:Factors of 33: 1, 3, 11, 33Factors of 82: 1, 2, 41, 82When you compare the two lists of factors, you can see that the only common factor is 1. So, in this case, the GCF of 33 and 82 is 1.Find the GCF of Other Number PairsWant more practice? Try some of these other GCF problems:What is the GCF of 137 and 58?What is the GCF of 90 and 59?What is the GCF of 56 and 112?What is the GCF of 138 and 104?What is the GCF of 113 and 94?